Automatic plow



J. P. PIZARRO AUTOMATIC PLOW Aug. 4, 1936.

Filed Jani. '7, 1935 5 Sheets-Sheet 1 Jafffzzdfl'a,

INVENTOR E* W ATTORNEY Aug. 4, 1936. J, R MARR@ 2,050,120

' AUTOMATIC PLOW Filed Jan. 7, 1935 5 sneetsl-sheet 2 f l ATTORNEY WITNESS J. P. PIZARRO AUTOMATIC PLOW Filed Jan. 7, 1935 5 Sheets-Sheet 3 :NfEN-ron l'lll Il II'II ATTORNEY Patented Aug. 4, 1936 UNITED STATES PATENT OFFICE AUTOMATIC PLOW Jos Polanco Pizarro, Central Aguirre, Puerto Rico The invention relates to a plow construction and more especially to motor operated or automatic plows. Y v

The primary object of the invention is the provision of a plow of this character, wherein ground working elements of different characteristics are arranged so that the soil will be plowed and tilled, the implements being mounted so that the same will be raised and lowered by a power l medium for varying the penetrating depth thereof in the soil and also certain of these elements are rotatable for breaking lumps of soil and others for digging and scraping purposes so that positive and thorough cutting and breaking of the soil is assured in the operation of the plow.

Another object of the invention is the provision of a plow of this character, wherein the cutting implements are susceptible of tilting action to avoid breaking of the same when striking an obstruction and such elements will return to normal position after tilting through tension action for ground working service.

A further object of the invention is the provision of a plow of this character, wherein the ground working implements are carried on a swinging frame, the same being raised by motive power and said implements are adjusted for vertical movements to regulate the depth of ground action and the operation of the plow being automatic.

A still further object of the invention is the provision of a plow of this character, which is comparatively simple in its construction, thoroughly reliable and efficient in its operation, power operated, readily and easily adjusted, automatically controlled, strong, durable, and comparatively inexpensive to manufacture.

With these and other objects in view, the invention consists in the features of construction,

combination and arrangement of parts, as will be hereinafter fully described in detail, illustrated in the accompanying drawings which disclose the preferred embodiment of the invention and pointed out in the claims hereunto appended.

In the accompanying drawings:

Figure 1 is a top plan view of the plow constructed in accordance with the invention, a portion of a tractor being shown associated there- With.

Figure 2 is a vertical longitudinal sectional view of the same.

Figure 3 is a vertical transverse sectional view.

Figure 4 is a bottom plan View of the structure shown in Figure 3.

CII

Figure 5 is a fragmentary enlarged vertical sectional view thereof.

Figure 6 is a bottom plan View of the ground working elements.

Similar reference characters indicate corre- 5 frame I8 is adapted to be raised vertically rela- 15" tive thereto.

Arranged fore, aft and intermediate of the frame I0 are series of circular shaped gear boxes I4, I5 and I6, respectively, there being two aft boxes I 6, three intermediate boxes I5 and a single 2o fore box I4. 'Ihe boxes I5 and I6 are located transversely of the frame I0 and the box I4, cenl trally thereof.

Extended longitudinally and located centrally of the frame Ill is a driving shaft l'! which at its 25` forward end through a universal coupling I8 has connection with the power shaft I 9 of the vehicle or tractor I3 while the rear end of this shaft I1 has rotatable and slidable tting in a bearing 2D adjustably threaded at 2| in a saddle 22 ar- 30 ranged between and made secure to the pair of aft boxes I6. The bearing 28 is held fixed after adjustment by a set screw 23 iitted in the saddle 22. This shaft I'I is passed through the box I4 and the box I5 at the center of the intermediate 35 series of the same, respectively. Loosely rotatable upon the shaft I'I and journaled in the box I4 is a beveled pinion 24 meshing with a companion bevel gear 25 having a hub 26 centrally journaled in the box I4 and threaded upon 40 a stem 21 vertically fitted centrally of the box I4 for raising and lowering movements. This stem 2'I has a pivotal connection at 28 with a swinging head or carrier 29 for a gang of ground openers or soil cutters 30. The head or carrier 29 is provided forwardly of the pivot 28 with a slotted upright arm 3l through which passes a spring tensioner 32 pivoted to the lower end of the box I4 while at the other side of the pivot 28 is a heel extension 33 against which acts a 50 coiled tensioning spring 34 having the seat 35 formed on a circular stop 36 on the stem 21. This spring 34 cooperates with the tensioner 32 to maintain the head 29 in a normal horizontal position and placing it under tension when 55 rocked or swung from normal position should the openers or cutters 30 meet an obstruction in the soil so that the openers or cutters may ride over the obstruction and be prevented from breaking by contact therewith. The stop 36 contacts with the box I4 when the stern 21 is raised and limits the elevation or raising movement of the head or carrier 24. The stem is squared in cross section outside of the lay of the threaded connection thereof with the hub 26 and this squared portion fits a corresponding shaped guideway in the box I4 so that the stem is prevented from rotation in the box, the hub 26 of the gear 25 being rotatably journaled in said box. The screw connection of the hub 26 with the stem 21 permits the raising and lowering of the latter for regulating the relation of the openers or cutters 30 with respect to the soil or ground.

The gear 24 is controlled by a clutch 31 so that it may be locked with or unlocked from the shaft I1 and this clutch 31 is manually actuated from a latch release hand throw lever 38. In this manner a direct hand control for raising and lowering action of the openers or cutters 36 is had.

In each of the pair of aft boxes I6 is arranged a bevel gear 39 which is similar to the gear 25 and is in threaded connection with a stern 40 corresponding to the stem 21 and by a pivot 4I swingingly carries a ground or soil cutting implement or element 42, which is in the form of a plow tensioned against rocking movement by the devices 43 and 44, respectively, these corresponding to the parts 32 and 34 hereinbefore described. The gear 39 meshes with a pinion 45. The pinions 45 are xed to driven shafts 46 these being journaled in the boxes I6 and through sprocket and chain connections 41 and an associated clutch 48 therewith and the shaft I1 will be driven from the latter. On the driving of the shafts 46 the ground working elements 42 each will be adjusted vertically relative to the ground or soil. The clutch 48 is manually actuated frorn a latch release hand lever 49.

Mounted for vertical slidable adjustment ln the outer boxes I5 of the intermediate series are raising and lowering stems 50 having internal threaded engagement with the hubs 5I of bevel gears 52 meshing with pinions 53 on driven shafts 54, these through sprocket and chain connections 55 in association with a clutch 56 therewith and the shaft I1 will be driven by the latter. These stems 50 at their lower ends support rotatable disks 51, these being formed with inset peripheral gear teeth 58 meshing with a gear 59 located between the disks 51. This gear 59 is slidably fitted with and rotatable by a stem 60 journaled centrally in the box I5 centrally located of the intermediate series. The stem has tted therewith the gear 6I meshing with a pinion 62. Thus it will be apparent that the stem 60 will be rotated from the shaft I1 and simultaneously the stems 50 may be adjusted vertically for regulating the relation of the disks 51 with respect to the ground or soil. The clutch 56 is manually controlled through a latch release hand throw lever 63 and regulates the driving of the chain and sprocket connections 55. These hand levers 38, 49 and 63 are preferably located together on a suitable stand or mount 64 upon the frame I 0. The disks 51 and the gear 59 in their meshing engagement are interlocked for simultaneous vertical movement with each other.

The disks 51 carry ground working spikes or teeth 65 arranged spaced from each other and radially disposed along curvilinear paths outwardly of the disks and function to break up lumps and are narrow-acting upon the ground or soil in the use of the plow.

At the rearmost ends of the side sills I2 are uprights 66 having a journal therein the axle 61 for windlasses or Winches 68 carrying hoist cables 69 to be wound on and unwound therefrom and attached by ears 10 at the rear portion or the frame IIJ. When the cables 69 are wound upon the windlasses or Winches 68 the frame IU will swing vertically on the pivots II for the rear end raising of this frame. The power shaft I9 through the clutch control supplemental or auxiliary driving connections 1I with the axle 61 drives the latter by the working of the windlasses or the Winches, the clutch for the connections 1I being indicated at 12 and is manually controlled.

It will be understood that in the use of the plowing machine constructed as heretofore stated the openers or cutters 36 will be vertically adjusted by mechanical power, this being true with respect to the plows 42 and the disks 51 for the proper ground Working action in the draft of the machine by the vehicle or tractor I3. The disks 51 are driven for rotation by the shaft I1 which is connected with the power shaft I9 of the said Vehicle or tractor and the spikes or teeth 65 of these disks will break lumps of soil and give a scraping action on the latter. The openers or cutters 30 and the plows 42 in their advancement will be free for tripping action when meeting obstructions so as to become freed therefrom without being damaged thereby. The frame I0 can be readily lifted on the operation of the windlasses or Winches for the winding of the hoisting cables 69 thereon and thus rendering the machine inactive so that it may be transported from one locality to another under draft of the vehicle or tractor I3. The plowing machine is suitable for cane agriculture and is serviceable for soil tilling in agricultural activities.

Carried by the uprights 66 and engageable with the frame I9 and opposite sides thereof are latching pins 13 which serve to hold the frame I0 in an elevated position.

What is claimed is:

1. A machine of the kind described comprising a frame, gear boxes arranged fore and aft of said frame, beveled gears journaled in the boxes, stems vertically adjustable in certain of said boxes on the turning of said gears, ground working implements on said stems, means tensioning certain of the ground working elements for permitting automatic tripping thereof, a power shaft having connection with certain of the ground working elements for imparting motion thereto and operating through the remainder of said gear boxes, and clutch controlled means between the power shaft and the beveled gears for operating the latter.

2. A machine of the kind described comprising a frame, gear boxes arranged fore and aft of said frame, beveled gears journaled in the boxes, stems vertically adjustable in certain of said boxes on the turning of said gears, ground working implements on said stems, means tensioning certain of the ground working elements for permitting automatic tripping thereof, a power shaft having connection with certain of the ground working elements for imparting motion thereto and operating through the remainder of said gear boxes, clutch controlled means between the power shaft 2,o5o,12o

and the beveled gears for operating the latter,

and a motor vehicle having supports for said frame.

3. A machine of the kind described comprising a frame, gear boxes arranged fore and aft of said frame, beveled gears journaled in the boxes. stems vertically adjustable in certain of said boxes on the turning of said gears, ground working implements on said stems, means tensioning certain of the ground working eelements for permitting automatic tripping thereof, a power shaft having connection with certain of the ground working elements for imparting motion thereto and operating through the remainder of said gear boxes, clutch controlled means between the power shaft and the beveled gears for operating the latter, a motor vehicle having supports for said frame, and pivots mounting the frame in said supports for vertical swinging movement of said frame.

4. A machine of the kind described comprising a frame, gear boxes arranged fore and aft of said frame, beveled gears journaled in the boxes, stems vertically adjustable in certain of said boxes on the turning of said gears, :ground working implements on said stems, means tensioning certain of the ground working elements for permitting automatic tripping thereof, a power shaft having connection with certain of the ground working elements for imparting motion thereto and operating through the remainder of said gear boxes, clutch controlled means between the power shaft and the beveled gears for operating the latter, a motor vehicle having supports for said frame, pivots mounting the frame in said supports for vertical swinging movement of said frame, and means operated by the vehicle for raising and lowering said frame.

JOSE POLANCO PIZARRO. 

